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Bioestrecho

SpeciesBirds

Western Jackdaw

Corvus monedula

Order
Passeriformes
Family
Corvidae
Presence in the Strait
Resident
Abundance
common
IUCN (global)
LC · Least concern
In Spanish
Grajilla occidental

Photograph: User:MatthiasKabel, CC BY-SA 3.0, vía Wikimedia Commons

Length
33 cm
Weight
240 g
02040LENGTH33 cmcentimetres

Presence in the Strait

Common resident of cliffs and constructions outside cities. Unknown in Cadiz province until great expansion in the ‘50s, arriving at Las Lomas and Gibraltar in 1960 and 1964 respectively. The population of the Strait is divided into two by the Central mountains: the Western and the Eastern populations, which seem to be isolated and to have different origins, the Western population in Seville and the Eastern population in Malaga.

Identification

Smallest of the corvids. Completely black at first sight, but has a grey nape and breast. Light-grey eyes and short, black bill. Highly gregarious.

Movements

Sedentary but with a winter influx. Its numbers vary considerably from year to year and may exceed 12,000 birds as in 1994 at Las Lomas. Peaks in March and October.

Bioestrecho editorial text. Last revised: 8 September 2026.